Budolph vollschwitz



(No Model.)

R. VOLLSGHWITZ.

RAS?.

No. 379,620. Patented Mar. 20, 1888.

llNrTnn STATES PATENT Strien.

RUDOLPH VOLLSCHWITZ, OF HOBOKEN, NEW JERSEY.

RASP.

SPECIFICATION forming part of Letters Patent No. 379,620. dated March20, 1888. Application tiled llIay 2G, 1887. Serial No. 239,381. (Nomodel.)

T all whom, t may concern:

Be it known that LRUDoLPI-r VoLLscHwITz, of Hoboken, in the county ofHudson and State of New Jersey, have invented a certain new and usefulImprovement inRasps, of which the following is a specification.

My present invention is au improvement on the rasp which is the subjectof Letters Patent ofthe United States granted to me April 18, 1883, No.285,185.

Iwill describe my improvement in detail,and then point out the novelfeatures in the claims.

In the accompanying drawings, Figure lis a side view of a rasp embodyingmy improvement. Fig. 2 is Aan edge view thereof. Fig. 3

is a transverse section thereof, taken on the.

plane of the line x x, Fig. 1. Fig. 4. is a view of certain rasp-teethand a plate with which they are formed,constituting part of myinvention. Fig. 5 is a transverse section thereof, taken at the plane ofthe line yy, Fig. 4. Figs. 4 and 5 are on an enlarged scale.

Similar letters of reference designate corresponding parts in all thefigures.

A designates flat metal plates. These plates are perforated, as shown,by parallel rows of perforations a, extending at right angles to thelength of the plates. Preferably the perforations of one row areopposite the spaces between the perforations of the next adjacent row orrows.

B designates plates of metal provided with teeth b, whichconstitute,when in position,the cutting portions of the rasp. Theseteeth are integral with the plates B, and are formed by making incisionswith any suitable tool in one of the side edges of the plate, whichincisions by preference extend to about midway in the width of theplates and at right angles to the lengths thereof. The incisions havingbeen made, the portions of metal between them are bent at angles to thedirection of the width of the plates. A portion of the teeth are bentinone direction and a portion in the other, and I prefer that alternateteeth shall be bent in opposite directions, as shown more clearly inFig. 4.. The number of incisions may be such that an equal number ofteeth will extend in each direction. As shown more clearly in Fig. 5,the teeth are bent at such an angle t-o the plates B as that across-section of the plate and teeth will be approximately Y-shaped. Theplates B are placed between the plates A in such manner that the teeth bupon one of the sides of the plates B will extend through theperforations a in one of the plates A, and the teeth b upon the othersides of the plates B will extend through the perforations c in theother of the plates A. When asuftlcient number of the plates B have beenplaced between the plates A, so that all the perforations a havereceived teeth b,the plates A are riveted together firmly, whereby theplates B are securely clamped between the plates A and prevented frommovement. The teeth of alternate rows occupy positions opposite thespaces between the teeth of the next adjacent row or rows, and when bentin the manner indicated incline toward the forward end of the rasp, asshown more clearly in Fig. 2.

If desired, the teeth b may be sharpened before being placed between theplates A; but they may be sharpened afterward. I prefer to so sharpenthem that their tops or outer ends shall have surfaces approximatelyparallel with the surfaces of the plates A.

What I claim as my invention, and desire to secure by Letters Patent, is

l. As a new article of manufacture, a rasp comprising metal platesprovided with rows of perforations, other plates provided with rows ofteeth bent from the plates last named, the teeth of one row being bentin an opposite direction to the teeth of the other row, saidlastnamedplates being arranged in such manner that the teeth thereof will extendthrough said perforations after the first-named plates have been securedtogether, substantially as specitied.

2. As a new article of manufacture, a rasp comprising metal platesprovided with rows of perforations extending at approximate right anglesto the lengths of the plates, the perforations of one row being oppositethe spaces between the perforations of the next adjacent row or rows,other plates provided with rows of teeth bent from the plates lastnamed, the teeth of one row being bent in an opposite direction to theteeth of the other row, said lastnamed plates being arranged between thefirstnamed plates in such manner that the teeth thereof will extendthrough said perforations IOO after the first-named plates have beensecured together, substantially as specified.

3. As a new article of manufacture, a rasp comprising metal platesprovided with rows of perforations, other plates provided with rows ofteeth bent from the plates last named, the teeth of one row being bentin an opposite di rection to the teeth of the other row, said lastnamedplates being arranged between the firstnamed plates inlsuch manner thatthe teeth thereof will extend through said perforations after thefirst-named plates have been secured together, said teeth being so bentthat when thus placed they will extend at an incline to- I 5 ward theforward end of the rasp,substantially as specified.

4. As a new article of manufacture, a rasp comprising metal platesprovided with rows of perforations, other plates provided with rows ofteeth bent from the plates last named, the teeth of one row being bentin an opposite direction to the teeth of the other row, said lastnamedvplates being arranged betweenr the plates rst named in such manner thatthe teeth thereof will extend through said perforations after thefirst-named plates have been secured together, the surfaces of the topsor outer ends of such teeth being approximately parallel with thesurfaces of the plates first named,and said teeth being so bent thatwhen thus placed they will extend at an incline toward the forward endof the rasp, substantially as specified.

.'RUDOLPH VOLLSGHWITZ. Witnesses: l D. H. DRIscoLL, l M. J. RoAcH.

